>>512374871
They have existed alongside humans for all of history, neanderthal predation and cannibalism dates back over 100K years. They were doing it during the Saturnian era, up to the Deluge and the destruction of early civilizations.
Survivors maintained their old practices, and formed societies alongside human groups dating back further than known history. They infiltrated Babylon, they built Carthage and Judea.
Rome was even more bloodthirsty, and had superior organization, tactics and logistics. Cannibal cults were destroyed until the Empire was infiltrated from within by surviving death cult groups, maybe out of Venizia, as that city was founded by Phoenicians.